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Mixed Minerals

Sunday, 06 November 2022 06:00 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including alum-(na), clinojimthompsonite, creedite, fluorite, metavariscite, and mimetite and more from places like Sapper Fumarole, El Palmar, Quetzaltenango, Guatemala, Carlton quarry, Chester, Windsor Co., Vermont, United States, Qinglong Co., Qianxi'nan, Guizhou prov, China, Gordonsville mine, Carthage, Smith Co., Tennessee, United States, Lucin Hill, Box Elder Co., Utah, United States, and San Rafael mine, Nye Co., Nevada, United States.

Alum-(Na)

#BW59493
Locality
Sapper Fumarole, El Palmar, Quetzaltenango, Guatemala 
Formula
NaAl(SO4)2·12H2
Availability
Available
Price
$40.00
Size
3.5 x 3.5 x 2.5 cm - Miniature 

Spherules of white to colorless Alum-(Na) in a spongy, very light weight matrix. I have no idea what this matrix is.


Alum-(Na)

Formula
NaAl(SO4)2·12H2
Crystal System
Isometric 
Crystal Habit
Fibrous 
Luster
Vitreous (Glassy) 
Color
colorless 
Class
Isometric - Diploidal 
Hardness
Collection
Bill Wilson Collection

Clinojimthompsonite

with Chesterite & Jimthompsonite - #59637
Locality
Carlton quarry, Chester, Windsor Co., Vermont, United States 
Formula
Mg5Si6O16(OH)2 
Availability
Available
Price
$40.00
Size
4 x 1.5 x 1.5 cm - Miniature 
Special Info
Type Locality 

These three minerals you cannot discern with any confidence. Basically they are light to dark green. The Pryite is easily recognized, of course. There is probably Talc and Anthophyllite in the specimen as well. A label from the Cureton Mineral Co. founded by the late Forrest Cureton comes with the specimen. Forrest was a great mineralogist, a friend of mine.


Clinojimthompsonite

Formula
Mg5Si6O16(OH)2 
Crystal System
Monoclinic 
Cleavage
Good, None, None 
Luster
Silky - Pearly 
Color
colorless, pink brown 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
2-2.5 
Special Info
Type Locality

Creedite

#59591
Locality
Qinglong Co., Qianxi'nan, Guizhou prov, China 
Formula
Ca3Al2(SO4)(OH)2F8·2H2
Availability
Available
Price
$295.00
Size
7 x 5 x 3.5 cm - Sm Cabinet 

Nice eye-candy specimen with Creedite crystals from 1 to 5mm with a dusting of purple Fluorite. Gorgeous specimen, no damage.


Creedite

Formula
Ca3Al2(SO4)(OH)2F8·2H2
Crystal System
Monoclinic 
Crystal Habit
Granular, Radial, Prismatic 
Cleavage
Perfect, None, None 
Luster
Vitreous - Greasy 
Color
colorless, violet, white 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
3.5 
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Fluorite

#59537
Locality
Gordonsville mine, Carthage, Smith Co., Tennessee, United States 
Formula
CaF2 
Availability
Available
Price
$75.00
Size
8 x 5.5 x 2.5 cm - Sm Cabinet 

Purple Fluorite crystals to 9mm on edge. This specimen sits well and is nicely trimmed.


Fluorite

Formula
CaF2 
Crystal System
Isometric 
Crystal Habit
Crystalline - Coarse, Massive - Granular, Disseminated 
Cleavage
Three perfect, octahedral cleavages. 
Luster
Vitreous (Glassy) 
Color
purple, clear, yellow, green, red, blue 
Streak
white 
Geological Setting
Occurs in a wide range of geologic environments including low temperature Missississippi Valley lead-zinc deposits, hydrothermal gold deposits, Alpine cleft metamorphic environments  
Class
Isometric - Hexoctahedral 
Fracture
Uneven 
Hardness
Mineralpedia
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Metavariscite

#48744
Locality
Lucin Hill, Box Elder Co., Utah, United States 
Formula
AlPO4·2H2
Availability
Available
Price
$45.00
Size
6.5 x 5 x 4 cm - Sm Cabinet 
Tagged
phosphate  

Excellent light green bladed crystals as singles and clusters.


Metavariscite

Formula
AlPO4·2H2
Crystal System
Monoclinic 
Cleavage
Good, None, None 
Luster
Vitreous (Glassy) 
Color
light green 
Streak
white 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
3.5 

Mimetite

#59619
Locality
San Rafael mine, Nye Co., Nevada, United States 
Formula
Pb5(AsO4)3Cl 
Availability
Available
Price
$30.00
Size
4.5 x 3 x 1.5 cm - Miniature 
Tagged
arsenate  

The specimen originated from Dr. Bill Wise, the late professor of mineralogy at the University of California at Santa Barbara. He collected it in 1975. The yellow is the Mimetite, gorgeous little crystals. 


Mimetite

Formula
Pb5(AsO4)3Cl 
Crystal System
Hexagonal 
Crystal Habit
Reniform, Globular, Prismatic 
Cleavage
Imperfect, None, None 
Luster
Adamantine - Resinous 
Color
white, yellow, orange, brown, red 
Streak
white 
Class
Hexagonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 
Mineralpedia
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